Number of ways to write n as an ordered sum of 7 nonzero triangular numbers.

Terms

a(0) =1a(1) =0a(2) =7a(3) =0a(4) =21a(5) =7a(6) =35a(7) =42a(8) =35a(9) =112a(10) =42a(11) =182a(12) =112a(13) =210a(14) =260a(15) =217a(16) =462a(17) =252a(18) =651a(19) =399a(20) =728a(21) =777a(22) =672a(23) =1232a(24) =749a(25) =1533a(26) =1127a(27) =1659a(28) =1617a(29) =1792